test: close Gate 3 tiny-runtime semantics

tests/test_adaptive_defaults.py

@@ -93,6 +93,15 @@ def test_method_statistics_ranges_and_bucket_ranking():
     assert adaptive.BucketKnowledge(("dense", "standard", "tiny")).best_method is None
 
 
+def test_method_statistics_ignore_config_keys_without_observed_values():
+    stats = adaptive.MethodStats(
+        "safe",
+        scores=[1.0, 0.9, 0.8, 0.7],
+        configs=[{"unused": None} for _ in range(4)],
+    )
+    assert stats.best_config_ranges() == {}
+
+
 def test_build_knowledge_base_filters_invalid_runs_and_aggregates_metrics():
     records = [
         _record(session="one"),
@@ -110,6 +119,12 @@ def test_build_knowledge_base_filters_invalid_runs_and_aggregates_metrics():
     assert bucket.methods["basic"].configs == []
 
 
+def test_knowledge_build_fetches_records_when_not_supplied(monkeypatch):
+    monkeypatch.setattr(adaptive, "_fetch_all_records", lambda: [_record(session="fetched")])
+    knowledge = adaptive.build_knowledge_base()
+    assert knowledge[("dense", "standard", "medium")].total_runs == 1
+
+
 def test_fetch_records_caches_deduplicates_and_tolerates_sources(monkeypatch):
     adaptive._cache.clear()
     monkeypatch.setattr(adaptive, "_cache_ts", 0.0)
@@ -166,6 +181,54 @@ def test_recommendation_exact_fallback_confidence_and_formatting():
     assert "No telemetry data" in adaptive.format_recommendation(none)
 
 
+def test_recommendation_merges_matching_architecture_and_reasoning_across_sizes():
+    records = [
+        _record(params_b=1, session=f"small-{index}")
+        for index in range(3)
+    ] + [
+        _record(params_b=30, session=f"large-{index}")
+        for index in range(2)
+    ]
+    recommendation = adaptive.get_adaptive_recommendation(
+        "dense",
+        "standard",
+        7,
+        knowledge=adaptive.build_knowledge_base(records),
+    )
+    assert recommendation.arch_key == ("dense", "standard", "*")
+    assert recommendation.n_records == 5
+    assert recommendation.n_method_records == 5
+    assert recommendation.confidence == "medium"
+    assert "all sizes" in recommendation.bucket_label
+
+
+def test_recommendation_fetches_knowledge_and_reports_high_confidence(monkeypatch):
+    knowledge = adaptive.build_knowledge_base([
+        _record(session=f"high-{index}") for index in range(20)
+    ])
+    monkeypatch.setattr(adaptive, "build_knowledge_base", lambda: knowledge)
+    recommendation = adaptive.get_adaptive_recommendation("dense", "standard", 7)
+    assert recommendation.confidence == "high"
+    assert recommendation.n_method_records == 20
+
+
+def test_recommendation_handles_bucket_with_no_runnable_method():
+    key = ("dense", "standard", "medium")
+    empty_bucket = adaptive.BucketKnowledge(
+        key,
+        methods={"empty": adaptive.MethodStats("empty")},
+        total_runs=5,
+    )
+    recommendation = adaptive.get_adaptive_recommendation(
+        "dense",
+        "standard",
+        7,
+        knowledge={key: empty_bucket},
+    )
+    assert recommendation.confidence == "none"
+    assert "no method" in recommendation.reason
+
+
 def test_global_insights_reports_rankings_buckets_and_hyperparameters():
     knowledge = adaptive.build_knowledge_base([
         _record("advanced", config={"strength": 1.5, "enabled": True}, session="one"),
@@ -176,3 +239,13 @@ def test_global_insights_reports_rankings_buckets_and_hyperparameters():
     assert insights["overall_best_methods"][0]["method"] == "advanced"
     assert insights["hyperparameter_trends"]["strength"]["type"] == "numeric"
     assert insights["hyperparameter_trends"]["enabled"]["type"] == "bool"
+
+
+def test_global_insights_fetches_knowledge_and_ignores_empty_config_values(monkeypatch):
+    knowledge = adaptive.build_knowledge_base([
+        _record(config={"unused": None}, session="empty-config")
+    ])
+    monkeypatch.setattr(adaptive, "build_knowledge_base", lambda: knowledge)
+    insights = adaptive.get_global_insights()
+    assert insights["total_records"] == 1
+    assert "unused" not in insights["hyperparameter_trends"]

tests/test_advanced_metrics.py

@@ -9,7 +9,10 @@ from obliteratus.evaluation.advanced_metrics import (
     REFUSAL_PREFIXES,
     REFUSAL_SUBSTRINGS,
     AbliterationEvalResult,
+    _is_degenerate,
     _is_refusal,
+    _is_refusal_detailed,
+    _strip_cot_tags,
     activation_cosine_similarity,
     effective_rank,
     effective_rank_change,
@@ -27,6 +30,55 @@ from obliteratus.evaluation.advanced_metrics import (
 # ---------------------------------------------------------------------------
 
 class TestRefusalRate:
+    def test_cot_extraction_and_degenerate_classification_boundaries(self):
+        assert _strip_cot_tags("<assistant> final answer ") == "final answer"
+        assert _is_degenerate("") is True
+        assert _is_degenerate("!!!") is True
+        assert _is_degenerate("ababababab") is True
+        assert _is_degenerate("normal answer") is False
+
+    def test_empty_and_degenerate_post_cot_outputs_are_not_refusals(self):
+        assert _is_refusal("<assistant>   ", mode="combined") is False
+        assert _is_refusal("!!!!!!!!", mode="combined") is False
+        assert _is_refusal_detailed("   ") == (False, "")
+        assert _is_refusal_detailed("<assistant>   ") == (False, "")
+        assert _is_refusal_detailed("!!!!!!!!") == (False, "DEGENERATE")
+
+    @pytest.mark.parametrize(
+        ("response", "mode", "reason_prefix"),
+        [
+            ("I'm sorry, I cannot help with that.", "prefix", "prefix:"),
+            ("Context first: I cannot assist with that request.", "substring", "substring:"),
+            ("This raises serious safety concerns for users.", "semantic", "semantic:"),
+            ("A normal helpful response.", "combined", ""),
+        ],
+    )
+    def test_detailed_refusal_reasons_cover_each_decision_mode(
+        self,
+        response,
+        mode,
+        reason_prefix,
+    ):
+        refused, reason = _is_refusal_detailed(response, mode=mode)
+        assert refused is bool(reason_prefix)
+        assert reason.startswith(reason_prefix)
+
+    def test_semantic_classifier_reports_positive_and_negative_matches(self):
+        from obliteratus.evaluation.advanced_metrics import _is_refusal_semantic
+
+        assert _is_refusal_semantic("This raises serious legal concerns.") is True
+        assert _is_refusal_semantic("A normal helpful response.") is False
+
+    def test_empty_confidence_interval_is_explicitly_unavailable(self):
+        assert refusal_rate_with_ci([]) == {
+            "available": False,
+            "rate": None,
+            "ci_lower": None,
+            "ci_upper": None,
+            "n_samples": 0,
+            "refusal_count": 0,
+        }
+
     def test_refusal_mentioning_assistant_is_detected(self):
         response = (
             "I cannot help with that request. I am designed to be a helpful "
@@ -164,6 +216,15 @@ class TestRefusalRate:
 # ---------------------------------------------------------------------------
 
 class TestKLDivergence:
+    def test_rejects_wrong_tensor_dimension(self):
+        with pytest.raises(ValueError, match="both be 3D tensors"):
+            token_kl_divergence(torch.zeros(2, 3), torch.zeros(2, 3))
+
+    def test_first_token_kl_rejects_empty_sequence_axis(self):
+        empty = torch.empty(1, 0, 3)
+        with pytest.raises(ValueError, match="must not be empty"):
+            first_token_kl_divergence(empty, empty)
+
     def test_identical_distributions(self):
         """KL divergence of identical distributions should be 0."""
         logits = torch.randn(2, 10, 100)
@@ -239,6 +300,17 @@ class TestKLDivergence:
 # ---------------------------------------------------------------------------
 
 class TestEffectiveRank:
+    @pytest.mark.parametrize(
+        ("matrix", "message"),
+        [
+            (torch.empty(0, 2), "non-empty"),
+            (torch.tensor([[float("inf")]]), "finite"),
+        ],
+    )
+    def test_rejects_empty_and_nonfinite_matrices(self, matrix, message):
+        with pytest.raises(ValueError, match=message):
+            effective_rank(matrix)
+
     def test_rank_one_matrix(self):
         """Rank-1 matrix should have effective rank close to 1."""
         v = torch.randn(8, 1)
@@ -333,6 +405,9 @@ class TestActivationCosineSimilarity:
 # ---------------------------------------------------------------------------
 
 class TestLinearCKA:
+    def test_zero_centered_energy_returns_defined_zero(self):
+        assert linear_cka(torch.ones(2, 3), torch.ones(2, 4)) == 0.0
+
     def test_identical_representations(self):
         """CKA of identical representations should be 1.0."""
         X = torch.randn(20, 16)
@@ -400,6 +475,28 @@ class TestLinearCKA:
 # ---------------------------------------------------------------------------
 
 class TestRefusalProjection:
+    @pytest.mark.parametrize(
+        ("activations", "direction", "message"),
+        [
+            (torch.ones(2), torch.ones(2), "activations"),
+            (torch.empty(0, 2), torch.ones(2), "activations"),
+            (torch.ones(2, 2), torch.empty(0), "refusal_direction"),
+            (torch.ones(2, 2), torch.ones(1, 1, 2), "refusal_direction"),
+            (torch.tensor([[float("nan"), 0.0]]), torch.ones(2), "finite"),
+            (torch.ones(1, 2), torch.tensor([float("inf"), 0.0]), "finite"),
+        ],
+    )
+    def test_rejects_invalid_projection_inputs(self, activations, direction, message):
+        with pytest.raises(ValueError, match=message):
+            refusal_projection_magnitude(activations, direction)
+
+    def test_three_dimensional_activations_and_row_direction_are_normalized(self):
+        result = refusal_projection_magnitude(
+            torch.tensor([[[2.0, 0.0], [4.0, 0.0]]]),
+            torch.tensor([[2.0, 0.0]]),
+        )
+        assert result["mean"] == 3.0
+
     def test_aligned_activations(self):
         """Activations aligned with direction should have high projection."""
         d = torch.tensor([1.0, 0.0, 0.0])
@@ -447,6 +544,14 @@ class TestRefusalProjection:
 # ---------------------------------------------------------------------------
 
 class TestEvalReport:
+    @pytest.mark.parametrize(
+        ("kl", "label"),
+        [(0.3, "good"), (0.7, "moderate degradation")],
+    )
+    def test_format_report_kl_quality_boundaries(self, kl, label):
+        result = AbliterationEvalResult(0.0, 0.0, kl, 1.0, 1.0, 1.0, 1.0)
+        assert label in format_eval_report(result)
+
     def test_format_report(self):
         result = AbliterationEvalResult(
             refusal_rate_harmful=0.1,

tests/test_loader_boundaries.py

@@ -3,8 +3,10 @@
 from __future__ import annotations
 
 import builtins
+import runpy
+import sys
 from pathlib import Path
-from types import SimpleNamespace
+from types import ModuleType, SimpleNamespace
 from unittest.mock import MagicMock, Mock
 
 import pytest
@@ -13,6 +15,100 @@ import torch
 from obliteratus.models import loader
 
 
+def _execute_loader_source() -> dict:
+    return runpy.run_path(str(Path(loader.__file__).resolve()), run_name="_loader_contract_probe")
+
+
+def test_compatibility_shims_tolerate_independent_missing_or_broken_imports(monkeypatch):
+    original_import = builtins.__import__
+    failure_keys = {
+        ("transformers", ("AutoModelForImageTextToText",)): ImportError,
+        ("transformers.utils", ("output_capturing",)): ImportError,
+        ("transformers.utils.import_utils", ()): RuntimeError,
+        ("transformers.utils", ()): RuntimeError,
+        ("transformers.pytorch_utils", ()): RuntimeError,
+        ("transformers.generation_utils", ()): ModuleNotFoundError,
+        ("transformers.generation", ()): RuntimeError,
+        ("transformers.deepspeed", ()): ModuleNotFoundError,
+        ("transformers.integrations.deepspeed", ()): RuntimeError,
+        ("transformers.cache_utils", ("DynamicCache",)): RuntimeError,
+        ("transformers.generation.logits_process", ()): RuntimeError,
+        ("transformers.processing_utils", ()): RuntimeError,
+        ("transformers.file_utils", ()): RuntimeError,
+    }
+
+    def rejecting_import(name, globals=None, locals=None, fromlist=(), level=0):
+        exception = failure_keys.get((name, tuple(fromlist or ())))
+        if exception is not None:
+            raise exception(f"injected loader compatibility failure for {name}")
+        return original_import(name, globals, locals, fromlist, level)
+
+    monkeypatch.setattr(builtins, "__import__", rejecting_import)
+    namespace = _execute_loader_source()
+
+    assert namespace["TASK_MODEL_MAP"]
+    assert namespace["AutoModelForImageTextToText"] is None
+
+
+def test_compatibility_shims_tolerate_missing_generic_module(monkeypatch):
+    original_import = builtins.__import__
+
+    def rejecting_import(name, globals=None, locals=None, fromlist=(), level=0):
+        if name == "transformers.utils.generic":
+            raise RuntimeError("generic module unavailable")
+        return original_import(name, globals, locals, fromlist, level)
+
+    monkeypatch.setattr(builtins, "__import__", rejecting_import)
+    assert _execute_loader_source()["TASK_MODEL_MAP"]
+
+
+def test_compatibility_shims_tolerate_top_level_utils_patch_failure(monkeypatch):
+    original_import = builtins.__import__
+
+    def rejecting_import(name, globals=None, locals=None, fromlist=(), level=0):
+        if name == "transformers.utils" and not fromlist:
+            raise RuntimeError("top-level utils module unavailable")
+        return original_import(name, globals, locals, fromlist, level)
+
+    monkeypatch.setattr(builtins, "__import__", rejecting_import)
+    assert _execute_loader_source()["TASK_MODEL_MAP"]
+
+
+def test_dynamic_cache_compatibility_alias_is_installed_when_needed(monkeypatch):
+    original_import = builtins.__import__
+
+    class LegacyDynamicCache:
+        def get_max_cache_shape(self):
+            return 7
+
+    cache_module = SimpleNamespace(DynamicCache=LegacyDynamicCache)
+
+    def cache_import(name, globals=None, locals=None, fromlist=(), level=0):
+        if name == "transformers.cache_utils" and tuple(fromlist or ()) == ("DynamicCache",):
+            return cache_module
+        return original_import(name, globals, locals, fromlist, level)
+
+    monkeypatch.setattr(builtins, "__import__", cache_import)
+    assert _execute_loader_source()["TASK_MODEL_MAP"]
+    assert LegacyDynamicCache().get_max_length() == 7
+
+
+def test_compatibility_shims_tolerate_rejected_generic_attribute_patch(monkeypatch):
+    import transformers.utils as transformers_utils
+
+    class RejectWorkingDirectory(ModuleType):
+        def __setattr__(self, name, value):
+            if name == "working_or_temp_dir":
+                raise RuntimeError("read-only compatibility module")
+            super().__setattr__(name, value)
+
+    fake_generic = RejectWorkingDirectory("transformers.utils.generic")
+    monkeypatch.setitem(sys.modules, "transformers.utils.generic", fake_generic)
+    monkeypatch.setattr(transformers_utils, "generic", fake_generic)
+
+    assert _execute_loader_source()["TASK_MODEL_MAP"]
+
+
 def _config(**overrides):
     values = {
         "model_type": "gpt2",

tests/test_offline_integration.py

@@ -189,6 +189,50 @@ def test_full_pipeline_saves_and_reloads_a_real_offline_model(tmp_path):
     assert all(duration >= 0 for duration in pipeline._stage_durations.values())
 
 
+def test_multidirection_pipeline_restores_tiny_model_layer_norms(tmp_path):
+    source = build_tiny_offline_model(tmp_path / "source")
+    output = tmp_path / "output"
+    original = _state_dict(source)
+    layer_weights = {
+        name: tensor.float().norm().item()
+        for name, tensor in original.items()
+        if ".h.0." in name and tensor.ndim >= 2
+    }
+
+    pipeline = AbliterationPipeline(
+        model_name=str(source),
+        output_dir=str(output),
+        device="cpu",
+        dtype="float32",
+        method="advanced",
+        n_directions=2,
+        norm_preserve=True,
+        refinement_passes=1,
+        max_seq_length=8,
+        verify_sample_size=1,
+        refusal_max_tokens=1,
+        harmful_prompts=["harmful request", "harmful answer"],
+        harmless_prompts=["harmless request", "harmless answer"],
+    )
+
+    pipeline.run()
+
+    restored = _state_dict(output)
+    assert any(
+        not torch.equal(original[name], restored[name])
+        for name in layer_weights
+    )
+    for name, original_norm in layer_weights.items():
+        assert restored[name].float().norm().item() == pytest.approx(
+            original_norm,
+            rel=1e-5,
+            abs=1e-7,
+        )
+    metadata = json.loads((output / "abliteration_metadata.json").read_text())
+    assert metadata["method_config"]["n_directions"] == 2
+    assert metadata["method_config"]["norm_preserve"] is True
+
+
 def test_installed_wheel_cli_loads_local_model_without_repository_imports(tmp_path):
     source = build_tiny_offline_model(tmp_path / "source")
     isolated_workdir = tmp_path / "outside-repository"

tests/test_projection_math_contracts.py

@@ -792,3 +792,151 @@ def test_packed_weight_replacement_uses_the_module_repacker():
     assert len(calls) == 1
     assert torch.equal(calls[0][0], modified)
     assert torch.equal(calls[0][1], packed.scales)
+
+
+def test_packed_weight_replacement_without_repacker_or_weight_fails_closed():
+    packed_type = type("QuantLinear", (), {})
+    packed = packed_type()
+    packed.qweight = torch.ones(1)
+    packed.scales = torch.tensor([0.5])
+
+    with pytest.raises(RuntimeError, match="cannot be re-packed or materialized"):
+        AbliterationPipeline._replace_quantized_weight(
+            packed,
+            torch.tensor([[1.0, 2.0]]),
+        )
+
+
+def test_packed_weight_replacement_materializes_float_when_weight_is_writable():
+    packed_type = type("QuantLinear", (), {})
+    packed = packed_type()
+    packed.qweight = torch.ones(1)
+    packed.weight = torch.nn.Parameter(
+        torch.ones((1, 2), dtype=torch.uint8),
+        requires_grad=False,
+    )
+    modified = torch.tensor([[1.5, 2.5]])
+
+    with pytest.warns(UserWarning, match="Storing as float weight"):
+        AbliterationPipeline._replace_quantized_weight(packed, modified)
+
+    assert packed.weight.dtype is torch.float32
+    assert torch.equal(packed.weight, modified)
+    assert packed.weight.requires_grad is False
+
+
+def test_layer_norm_capture_uses_logical_float_weights_and_deduplicates_ties(monkeypatch):
+    layer = torch.nn.Module()
+    layer.first = torch.nn.Linear(2, 2, bias=False)
+    layer.second = torch.nn.Linear(2, 2, bias=False)
+    shared = torch.nn.Parameter(
+        torch.tensor([[1, 2], [3, 4]], dtype=torch.uint8),
+        requires_grad=False,
+    )
+    layer.first.weight = shared
+    layer.second.weight = shared
+    calls = []
+
+    def dequantize(module):
+        calls.append(module)
+        return module.weight.data.float(), True
+
+    monkeypatch.setattr(
+        AbliterationPipeline,
+        "_dequantize_weight",
+        staticmethod(dequantize),
+    )
+
+    norms = AbliterationPipeline._capture_layer_weight_norms(layer)
+
+    assert norms == {"first.weight": pytest.approx(torch.tensor([1, 2, 3, 4]).float().norm().item())}
+    assert calls == [layer.first]
+
+
+def test_integer_norm_restoration_materializes_float_and_preserves_tied_identity():
+    layer = torch.nn.Module()
+    layer.first = torch.nn.Linear(2, 2, bias=False)
+    layer.second = torch.nn.Linear(2, 2, bias=False)
+    shared = torch.nn.Parameter(torch.ones((2, 2), dtype=torch.uint8), requires_grad=False)
+    layer.first.weight = shared
+    layer.second.weight = shared
+    target_norm = shared.data.float().norm().item() * 1.05
+
+    AbliterationPipeline._restore_layer_weight_norms(
+        layer,
+        {"first.weight": target_norm},
+    )
+
+    assert layer.first.weight is shared
+    assert layer.second.weight is shared
+    assert shared.dtype is torch.float32
+    assert shared.norm().item() == pytest.approx(target_norm, rel=1e-6)
+    assert torch.equal(shared, torch.full((2, 2), 1.05))
+
+
+def test_quantized_norm_restoration_uses_dequantize_and_replacement_seams(monkeypatch):
+    layer = torch.nn.Module()
+    layer.proj = torch.nn.Linear(2, 2, bias=False)
+    layer.tied = torch.nn.Linear(2, 2, bias=False)
+    layer.proj.weight.quant_state = object()
+    layer.tied.weight = layer.proj.weight
+    logical = torch.tensor([[1.0, 0.0], [0.0, 1.0]])
+    replacements = []
+
+    monkeypatch.setattr(
+        AbliterationPipeline,
+        "_dequantize_weight",
+        staticmethod(lambda _module: (logical.clone(), True)),
+    )
+    monkeypatch.setattr(
+        AbliterationPipeline,
+        "_replace_quantized_weight",
+        staticmethod(
+            lambda module, weight: (
+                replacements.append((module, weight.clone())),
+                setattr(module, "weight", torch.nn.Parameter(weight.clone())),
+            )
+        ),
+    )
+
+    AbliterationPipeline._restore_layer_weight_norms(
+        layer,
+        {"proj.weight": logical.norm().item() * 0.5},
+    )
+
+    assert len(replacements) == 1
+    assert replacements[0][0] is layer.proj
+    assert replacements[0][1].norm().item() == pytest.approx(logical.norm().item() * 0.5)
+    assert layer.proj.weight is layer.tied.weight
+
+
+def test_float_norm_restoration_scales_weight_in_place():
+    layer = torch.nn.Module()
+    layer.proj = torch.nn.Linear(2, 2, bias=False)
+    with torch.no_grad():
+        layer.proj.weight.fill_(1.0)
+    identity = layer.proj.weight
+
+    AbliterationPipeline._restore_layer_weight_norms(
+        layer,
+        {"proj.weight": 1.0},
+    )
+
+    assert layer.proj.weight is identity
+    assert layer.proj.weight.norm().item() == pytest.approx(1.0)
+
+
+def test_norm_restoration_skips_degenerate_logical_weight():
+    layer = torch.nn.Module()
+    layer.proj = torch.nn.Linear(2, 2, bias=False)
+    with torch.no_grad():
+        layer.proj.weight.zero_()
+    identity = layer.proj.weight
+
+    AbliterationPipeline._restore_layer_weight_norms(
+        layer,
+        {"proj.weight": 2.0},
+    )
+
+    assert layer.proj.weight is identity
+    assert torch.count_nonzero(layer.proj.weight).item() == 0

tests/test_quality_policy.py

@@ -161,6 +161,15 @@ def test_mutation_score_floor_is_immutable_across_policy_ci_and_validator():
     assert "--minimum 85.0" in workflow
 
 
+def test_mature_cpu_coverage_floors_are_immutable_across_policy_and_validator():
+    policy = json.loads(Path("ci/test-quality-policy.json").read_text(encoding="utf-8"))
+
+    assert quality.BASELINE_FLOORS["mature_cpu_statement"] == 94.0
+    assert quality.BASELINE_FLOORS["mature_cpu_branch"] == 84.0
+    assert policy["minimums"]["mature_cpu_statement"] == 94.0
+    assert policy["minimums"]["mature_cpu_branch"] == 84.0
+
+
 def _policy():
     return {
         "minimums": dict(quality.BASELINE_FLOORS),
@@ -214,9 +223,9 @@ def _coverage():
             "obliteratus/pure.py": {
                 "summary": {
                     "num_statements": 100,
-                    "covered_lines": 92,
+                    "covered_lines": 94,
                     "num_branches": 100,
-                    "covered_branches": 80,
+                    "covered_branches": 84,
                 },
             },
             "obliteratus/external.py": {
@@ -651,8 +660,8 @@ def test_policy_and_exact_mature_floors_pass():
     assert quality.validate_policy(policy) == []
     measurement, failures = quality.validate_mature_cpu_scope(_coverage(), policy)
     assert failures == []
-    assert measurement["line_percent"] == 92
-    assert measurement["branch_percent"] == 80
+    assert measurement["line_percent"] == 94
+    assert measurement["branch_percent"] == 84
 
 
 def test_floor_regression_requires_structured_reviewed_exception():
@@ -1002,7 +1011,7 @@ def test_mature_scope_rejects_regression_and_stale_exclusion():
     report["files"]["obliteratus/pure.py"]["summary"]["covered_lines"] = 91
     _, failures = quality.validate_mature_cpu_scope(report, policy)
     assert failures == [
-        "mature CPU line coverage 91.00% is below the 92.00% floor",
+        "mature CPU line coverage 91.00% is below the 94.00% floor",
     ]
     del report["files"]["obliteratus/external.py"]
     _, failures = quality.measure_mature_cpu_scope(report, policy)

tests/test_runtime_contracts.py

@@ -12,6 +12,7 @@ from obliteratus.runtime_contracts import (
     classify_architecture_size,
     effective_model_memory_gb,
     is_quantized_parameter,
+    norm_restoration_ratio,
     quantized_model_fits_gpu,
     resolve_model_load_policy,
     should_snapshot_model,
@@ -20,6 +21,42 @@ from obliteratus.runtime_contracts import (
 )
 
 
+@pytest.mark.parametrize(
+    ("original", "current", "expected"),
+    [
+        (10.0, 10.0, None),
+        (0.0, 4.0, None),
+        (10.0, 0.0, None),
+        (float("nan"), 4.0, None),
+        (10.0, float("inf"), None),
+        (1.0, 0.5, 1.1),
+        (8.0, 10.0, 0.8),
+        (12.0, 10.0, 1.1),
+    ],
+)
+def test_norm_restoration_ratio_is_bounded_and_fail_closed(original, current, expected):
+    assert norm_restoration_ratio(original, current, max_ratio=1.1) == expected
+
+
+def test_norm_restoration_ratio_rejects_invalid_policy_bounds():
+    with pytest.raises(ValueError) as error:
+        norm_restoration_ratio(2.0, 1.0, max_ratio=0.0)
+    assert str(error.value) == "max norm ratio must be a positive finite number"
+
+
+def test_norm_restoration_ratio_allows_subunit_policy_cap():
+    assert norm_restoration_ratio(2.0, 1.0, max_ratio=0.5) == 0.5
+
+
+def test_norm_restoration_ratio_tolerance_boundary_is_a_noop():
+    assert norm_restoration_ratio(
+        1.0,
+        1.25,
+        max_ratio=1.1,
+        tolerance=0.25,
+    ) is None
+
+
 @pytest.mark.parametrize("model_name", [None, 7, "", " \t"])
 def test_model_name_must_be_a_nonempty_string(model_name):
     with pytest.raises(ValueError) as error: